Answer:
option D
Explanation:
The correct choice of Gaussian surface would be (D) a finite closed cylinder whose axis coincides with the axis of the rod and whose cross-section has a radius of . This is because the charged cylinder is of <em>infinite length</em> and hence there won't be any electric flux coming out of the top and bottom flat surfaces.
Now, to find out the magnitude of the electric field , we shall have to apply Gauss's law,
or, ( being the height of the Gaussian cylinder)
or,
Answer:
(a)
(b) v = 1064 m/s
Explanation:
(a) Frequency of electromagnetic wave,
Let is the wavelength of electromagnetic wave. It can be calculated as :
(b) Frequency of medium, f = 532 Hz
Wavelength,
Let v is the speed of sound wave in an unknown fluid. Using the relation as :
v = 1064 m/s
Hence, this is the required solution.
Scenes the chair wheels are up the person is rolling backwards and if the wheels were down then the person would go forwards
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The truck has more inertia, it is bigger/heavier so it would take a lot more force to get it to change its speed/direction